Quill: Bi-directional AI writing assistant

Annotate documents with inline feedback, then let AI agents respond directly through MCP. No API keys needed — agents connect through Claude Code or Cursor's MCP integration.

Architecture

┌────────────────┐     ~/.quill/      ┌──────────────┐
│  Quill macOS   │◄──── state.json ───►│  quill-mcp   │
│  quill-tui     │◄── document.json ──►│  (MCP server) │
│  quill-web     │◄─ agent-response ──►│              │
└────────────────┘      .json         └──────┬───────┘
                                              │ stdio
                                     ┌────────┴────────┐
                                     │  Claude Code    │
                                     │  Cursor         │
                                     │  Any MCP client │
                                     └─────────────────┘